A wind power generation device of a scroll type

Abstract

The present application relates to the field of wind power generation technology, and particularly relates to a vortex disc type wind collecting wind power generation device. The device comprises a generator, an impeller, and a rotational speed over-standard brake device arranged between the generator and the impeller, and the outer side of the impeller is provided with a vortex disc type wind collecting device. The vortex disc type wind collecting device comprises a top vortex disc and a bottom vortex disc arranged at the upper and lower ends of the impeller respectively, and a flow channel partition plate module is arranged between the top vortex disc and the bottom vortex disc. The natural wind field is adjusted by the fixed partition plate and the sliding partition plate in a streamline shape, the wind force is applied to the downwind blade part, the adverse wind resistance loss in the rotation of the impeller is eliminated, and the overall wind energy-electric energy conversion efficiency is improved by more than 20%.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, specifically to a vortex-type wind-collecting wind power generation device. Background Technology

[0002] Existing wind power generation devices have focused on improving the overall conversion efficiency of "wind energy-torque energy-electric energy" through continuous research and development in two technical directions: passive adaptation of the impeller to the wind field and active adjustment of the wind field.

[0003] Passive wind farm adaptable power generation devices are divided into two types: horizontal axis and vertical axis. To improve wind energy utilization efficiency, the industry has conducted extensive research and development improvements from the perspective of rotor adaptation to wind farms. However, due to limitations in the basic principles, especially the existence of rotor rotational resistance against the wind, these improvements have encountered significant bottlenecks in improving the efficiency of converting natural wind energy into electrical energy. Furthermore, existing passive wind power generation devices generally adopt a single-unit fixed-power design, which is not suitable for modularization and makes it difficult to adjust the power output in series.

[0004] Actively adjustable wind power generation devices all rely on Bernoulli's principle of fluid dynamics to adjust the wind field, thereby increasing wind speed and concentrating wind direction through certain structures (artificial or semi-artificial). Based on whether the fluid field adjustment structure moves with changes in wind direction, they are divided into fixed wind collection devices and servo-type wind collection devices.

[0005] Fixed wind collection devices are generally large in size and use large artificial structures such as buildings to adjust the wind field. This is called the "narrow tube effect type". For example, the wind collection wind power generation device with a three-sided artificial building structure developed by a company in Zhejiang. Secondly, segmented wind collection devices that realize the functions of wind collection, reversal, diffusion and speed increase according to the Bernoulli nozzle and Laval nozzle structure are called "wind tunnel type".

[0006] Follow-up wind collection devices are generally small in size, combining the outer shell of the wind tunnel structure with a horizontal axis power generation device, moving synchronously with changes in wind direction. Although efficiency is improved, their complex structure and high maintenance costs make large-scale development difficult.

[0007] The aforementioned passive wind power generation devices, as well as the "narrow-tube effect" wind power generation devices among active wind power generation devices, all have exposed blades, posing a risk of blade damage to migratory birds.

[0008] In summary, existing vertical axis wind turbines are limited to a passive adaptation to natural wind fields, resulting in significant efficiency losses due to fundamental limitations. During the circumferential rotation of the rotor, only a small portion of the blades (less than 1 / 3 of the blades) can collect wind power with the wind, while the majority of the blades rotate against the wind. Even with streamlined drag reduction measures, a large amount of rotational kinetic energy loss is unavoidable.

[0009] Among active wind power generation devices that adjust wind fields, existing "wind tunnel type" and "narrow-tube effect type" wind collection devices share common problems: large size, stringent site selection requirements, and significant limitations in application space. Furthermore, the "wind tunnel type" wind collection device involves a complex process for adjusting the wind field, resulting in considerable wind resistance losses; the "narrow-tube effect type" wind collection device, constrained by construction costs or building functionality, has less than ideal wind collection and guidance effects. Examples include the horn-shaped wind collection structure of the impulse wind power generation device (publication number CN102052255B) and the wind-gathering wind power generation device (publication number CN207647683U).

[0010] Some existing invention patents have a rough framework for disc-type wind collection, but none of them adopt the gradually changing flow channel and vortex disk layout with a circumferential downwind angle from the perspective of fluid mechanics, resulting in low wind collection efficiency. For example, the equally divided vertical wind guide plate type wind collection disc of the integrated wind power generation system with publication number CN202914248U. Another example is the wind-gathering and speed-up power generation device with publication number CN102562467A, where the motor part inside the wind-gathering duct disrupts the wind field and reduces wind collection efficiency. Yet another example is the integrated wind power generation system with publication number CN102953937A, whose generator layout is a circumferentially symmetrical multi-machine arrangement of horizontal axis wind turbines. Natural wind blowing in from any direction will cause the wind turbines on the opposite side of the wind direction to rotate in the opposite direction, making power generation difficult. Summary of the Invention

[0011] In view of the above-mentioned defects in the existing technology, the present invention breaks away from the technical idea of ​​the impeller of the vertical axis wind power generation device passively adapting to the wind field, and adopts a vortex wind collection device to realize wind field adjustment, providing a vortex wind collection wind power generation device, realizing efficient utilization of near-ground wind energy, and achieving ecological harmony by preventing bird damage.

[0012] To achieve the above objectives, the present invention adopts the following unique technical solution: the vortex-type wind turbine wind power generation device includes a generator, an impeller, and a speed over-limit braking device disposed between the two, wherein a vortex wind collection device is disposed on the outside of the impeller;

[0013] The vortex air collection device includes a top vortex and a bottom vortex respectively disposed at the upper and lower ends of the impeller, and a flow channel baffle module is disposed between the top vortex and the bottom vortex.

[0014] Furthermore, the flow channel baffle module includes several evenly distributed and spaced fixed baffles and sliding baffles. The fixed baffles and sliding baffles have the same structure and both adopt a streamlined shape with the interval gradually decreasing towards the impeller, thereby forming a gradually narrowing flow channel.

[0015] The natural wind field is adjusted by using streamlined fixed and sliding baffles, so that the wind force is applied to the downwind blades, completely eliminating the reverse wind field effect of the rotating blades, improving the conversion efficiency of wind energy to rotational torque energy to electrical energy, and greatly reducing the starting wind speed of the wind turbine.

[0016] It also includes a flow channel opening and closing assembly for adjusting the size of the openings at the ends of the fixed partition and the sliding partition. The flow channel opening and closing assembly includes a drive motor, a drive gear mounted on the output shaft of the drive motor, and a driven gear ring rotatably connected to the center of the bottom of the bottom vortex and meshing with the drive gear. The driven gear ring is provided with sealing plates that are the same number as the fixed partition and are evenly distributed. The lower end of the sliding partition is provided with a connecting rod groove. A rotating pin is provided in the center of the connecting rod groove and the center of the bottom surface of the sealing plate. The rotating pin on the sliding partition and the rotating pin on the sealing plate are connected by a connecting rod.

[0017] The flow channel opening and closing assembly also includes a wind speed sensor.

[0018] By adopting corresponding tapered flow channel designs according to different application scenarios, the natural wind speed can be increased by 2 to 6 times, reducing the start-up natural wind speed of the vertical axis wind power generation device to 1.2 m / s, thus achieving the purpose of generating electricity in a light breeze.

[0019] As an optimization, the angle between the fixed baffle and the sliding baffle is 120°, 90°, 60°, 45°, or 30°. It can also be an equal division of any non-integer angle. For any incoming wind direction, the converging channel has an intake air angle of not less than 60° (≥1 / 6 of the channel).

[0020] As an optimization, the number of blades in the impeller is equal to the number of tapered flow channels.

[0021] The ratio of the impeller diameter to the vortex fan diameter determines the velocity ratio of the converging flow channel, which needs to be determined based on the impeller torque power and impeller rotation radius. In addition, the number of impeller blades is generally equal to the number of converging flow channels.

[0022] Depending on the application scenario, several sets of vortex-type air collection devices and impellers can be arranged longitudinally, or the spacing between the bottom and top vortexes can be increased and the blade height increased. This can increase the installed power to 5 to 20 times that of the basic unit, and through large-scale building structure design, megawatt-level power generation can be achieved (Note: When two sets of vortex-type air collection devices are connected in series, the upward airflow from the bottom top vortex assists the drive of the upper impeller). When multiple sets of vortex-type air collection devices are connected in series, the bottom vortex of the upper layer can be discarded.

[0023] As an optimization, the top vortex is provided with several air vents located directly above the impeller, and the bottom vortex is provided with several slide rails that match the sliding baffle.

[0024] Natural wind enters the narrowing channel formed by the fixed and sliding baffles, which adjusts the wind field to achieve the predetermined wind speed and angle of action. The natural wind reaches the impeller inside the narrowing channel, driving the impeller to generate rotational torque, which in turn drives the generator below the impeller to rotate and generate electricity. The wind field, after the kinetic energy is released in the vortex wind collection device, overflows through the narrowing channel or the exhaust port above the top vortex.

[0025] As an optimization, the speed-over-limit braking device is a centrifugal overspeed clutch.

[0026] As an optimization, photovoltaic panels are installed on the top surface of the top vortex disk, as well as on the sun-facing surfaces of the fixed and sliding partitions. The photovoltaic panels work in conjunction with the generator to achieve combined wind and solar power generation.

[0027] As an optimization, the generator can be a conventional wind turbine, a permanent magnet wind turbine, or a magnetic levitation wind turbine.

[0028] As an optimization, the top vortex is provided with a shielding eave at the air outlet, and the outer edge of the bottom vortex is provided with a grid snow-leaking structure to prevent the accumulation and blockage of ice and snow in the flow channel.

[0029] The density of the converging flow channel and the arrangement of the fixed and sliding baffles naturally creates isolation from the outside environment, making it difficult for birds to come into contact with the rotating blades, thus greatly reducing the risk of harm to migratory birds. In special circumstances, a grid is installed on the outer edge of the vortex disk air collection device to isolate the internal space and prevent birds and other birds from entering the converging flow channel.

[0030] The beneficial effects of this invention are as follows: The vortex-type wind turbine generator provided by this invention adjusts the natural wind field through streamlined fixed and sliding baffles, directing wind force to the downwind blades, eliminating headwind resistance losses during impeller rotation, and improving the overall wind-to-electricity conversion efficiency by more than 20%. In terms of self-locking protection of this wind turbine generator in extreme windy weather, a combined protection method is adopted, which greatly improves the protection effect: on the one hand, a centrifugal overspeed clutch is used to lock and brake the generator shaft; on the other hand, a flow channel opening and closing component is used to seal the end of the flow channel. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 This is a front cross-sectional view of the present invention;

[0033] Figure 3 This is a schematic diagram of the exploded structure of the present invention;

[0034] Figure 4 A cross-sectional schematic diagram of the vortex air collection device with the flow channel opening and closing assembly in the open state;

[0035] Figure 5 A cross-sectional schematic diagram of the vortex air collection device in the closed state of the flow channel opening and closing component;

[0036] Figure 6 This is a schematic diagram of the overall structure of the flow channel opening and closing component of the present invention;

[0037] Figure 7 This is a three-dimensional structural diagram of the toothed ring and sealing plate of the present invention.

[0038] Among them, 1. vortex fan air collection device, 2. impeller, 3. generator, 4. speed over-limit braking device, 5. flow channel baffle module;

[0039] 101. Bottom vortex plate; 102. Top vortex plate; 103. Air vent; 104. Slide rail;

[0040] 501. Fixed partition; 502. Sliding partition; 503. Flow channel opening and closing assembly;

[0041] 5031. Drive motor; 5032. Drive gear; 5033. Driven gear ring; 5034. Sealing plate; 5035. Connecting rod; 5036. Rotating pin. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0043] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0044] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. Example 1

[0045] like Figure 1 — Figure 7 The vortex-type wind power generation device shown includes a generator 3, an impeller 2, and a speed over-limit braking device 4 installed between the two. A vortex wind collection device 1 is installed on the outside of the impeller 2.

[0046] The vortex wind collection device 1 includes a top vortex 102 and a bottom vortex 101 respectively disposed at the upper and lower ends of the impeller 2, and a flow channel baffle module 5 is disposed between the top vortex 102 and the bottom vortex 101.

[0047] In this embodiment, the flow channel baffle module 5 includes a plurality of evenly distributed and spaced fixed baffles 501 and sliding baffles 502. The fixed baffles 501 and sliding baffles 502 have the same structure and both adopt a streamlined shape with the interval gradually decreasing towards the impeller 2, thereby forming a gradually narrowing flow channel.

[0048] The natural wind field is adjusted by the streamlined fixed baffle 501 and sliding baffle 502, so that the wind force is applied to the downwind blade part, the reverse wind field effect of the rotating blade is completely eliminated, the wind energy-rotation torque energy-electric energy conversion efficiency is improved, and the starting wind speed of the wind turbine 3 is greatly reduced.

[0049] It also includes a flow channel opening and closing assembly 503 for adjusting the size of the openings at the ends of the fixed partition 501 and the sliding partition 502. The flow channel opening and closing assembly 503 includes a drive motor 5031, a drive gear 5032 disposed on the output shaft of the drive motor 5031, and a driven gear ring 5033 rotatably connected to the center of the bottom of the bottom volute 101 and meshing with the drive gear 5032. The driven gear ring 5033 is provided with sealing plates 5034, which are the same number as the fixed partition 501 and are evenly distributed. The lower end of the sliding partition 502 is provided with a connecting rod groove. A rotating pin 5036 is provided in the center of the connecting rod groove and the center of the bottom surface of the sealing plate 5034. The rotating pin 5036 on the sliding partition 502 and the rotating pin 5036 on the sealing plate 5034 are connected by a connecting rod 5035.

[0050] The flow channel opening and closing assembly 503 also includes a wind speed sensor.

[0051] By adopting corresponding tapered flow channel designs according to different application scenarios, the natural wind speed can be increased by 2 to 6 times, reducing the start-up natural wind speed of the vertical axis wind power generation device to 1.2 m / s, thus achieving the purpose of generating electricity in a light breeze.

[0052] In this embodiment, the angle between the fixed partition 501 and the sliding partition 502 is 120°, 90°, 60°, 45°, or 30°. It can also be an equal division of any non-integer angle. For any incoming wind direction, the converging flow channel has an intake air angle of not less than 60° (≥1 / 6 of the flow channel).

[0053] In this embodiment, the number of blades of the impeller 2 is equal to the number of tapered flow channels.

[0054] The diameter ratio of impeller 2 to vortex fan 1 determines the wind speed ratio of the converging flow channel, which needs to be determined based on the torque power and rotation radius of impeller 2. In addition, the number of impeller blades is generally equal to the number of converging flow channels.

[0055] Depending on the application scenario, several sets of vortex-type air collection devices 1 and impellers 2 can be arranged longitudinally, or the spacing between the bottom vortex 101 and the top vortex 102 can be increased and the blade height increased. The installed power can be increased to 5 to 20 times that of the basic unit, and megawatt-level power generation can be achieved through large-scale building structure design (Note: When two sets of vortex-type air collection devices 1 are connected in series, the upward exhaust air of the bottom top vortex 102 has an assisting effect on the drive of the upper impeller 2). When multiple sets of vortex-type air collection devices 1 are connected in series, the bottom vortex 101 of the upper layer can be discarded.

[0056] In this embodiment, the top vortex 102 is provided with a plurality of air vents 103 located directly above the impeller 2, and the air vents 103 are fan-shaped. The bottom vortex 101 is provided with a plurality of slide rails 104 that match the sliding partition 502.

[0057] Natural wind enters the narrowing channel formed by the fixed baffle 501 and the sliding baffle 502, which adjusts the wind field to achieve the predetermined wind speed and angle of action. Natural wind reaches the impeller 2 inside the narrowing channel, which drives the impeller 2 to generate rotational torque, thereby driving the generator 3 below the impeller 2 to rotate and generate electrical energy. The wind field after the kinetic energy is released in the vortex wind collection device 1 is dispersed through the narrowing channel or the air outlet 103 above the top vortex 102.

[0058] In this embodiment, the speed overrun braking device 4 is a centrifugal overspeed clutch.

[0059] As an optimization, the generator 3 is a conventional wind turbine, a permanent magnet wind turbine, or a magnetic levitation wind turbine. Example 2

[0060] This embodiment is basically the same as Embodiment 1, except that:

[0061] In this embodiment, photovoltaic panels are installed on the top surface of the top vortex disk 102 and on the sun-facing surfaces of the fixed partition 501 and the sliding partition 502. The photovoltaic panels work in conjunction with the generator 3 to achieve combined wind and solar power generation.

[0062] In this embodiment, a shielding eave is provided at the air outlet 103 of the top vortex 102, and a grid snow-leaking structure is provided on the outer edge of the bottom vortex 101 to prevent the accumulation and blockage of ice and snow in the flow channel.

[0063] The density of the converging flow channel and the arrangement of the fixed baffle 501 and the sliding baffle 502 naturally creates an isolation from the outside world, making it difficult for birds to come into contact with the rotating blades, thus greatly reducing the risk of harm to migratory birds. In special circumstances, a grid is set on the outer edge of the vortex disk air collecting device 1 to isolate the internal space and prevent birds and other birds from entering the converging flow channel.

[0064] Working principle: The vortex-type wind power generation device provided by the present invention allows natural wind to enter the gradually narrowing flow channel formed by the fixed baffle 501 and the sliding baffle 502, thereby adjusting the wind field to achieve the predetermined wind speed and angle of action. The natural wind reaches the impeller 2 inside the gradually narrowing flow channel, driving the impeller 2 to generate rotational torque, which in turn drives the generator 3 below the impeller 2 to rotate and generate electrical energy. The wind field after the kinetic energy is released in the vortex wind collection device 1 is dispersed through the gradually narrowing flow channel or the air outlet 103 above the top vortex 102.

[0065] In the event of extreme weather such as typhoons, the overspeed braking device 4 will activate its own protection settings to stop the impeller 2 and generator 3. If the wind speed increases further and may endanger the safety of the impeller 2 system, the wind speed sensor will detect the excessive wind speed and issue a release signal. The sealing plate 5034, which is arranged in close contact with the converging flow channel, will then seal the converging flow channel, thereby strengthening the protection.

[0066] The specific sealing process of sealing plate 5034 is as follows: When the wind speed sensor detects that the wind speed exceeds the standard, it sends a release signal and starts motor 5031 (the motor is connected to an external power source or generator). The rotation of motor 5031 drives the drive gear 5032 to rotate, which in turn drives the driven gear ring 5033 to rotate. At the same time, the connecting rod 5035 drives the sliding partition 502 to slide in the slide rail 104. Finally, under the combined action of sealing plate 5034 and sliding partition 502, the narrowing flow channel between partition 501 and sliding partition 502 is sealed. Of course, the opening size of the narrowing flow channel can also be controlled according to the actual wind speed, so as not to completely seal it.

[0067] The above-described specific embodiments are merely specific examples of the present invention. The patent protection scope of the present invention includes, but is not limited to, the product form and style of the above-described specific embodiments. Any appropriate changes or modifications made by a person skilled in the art that conform to the claims of the present invention should fall within the patent protection scope of the present invention.

Claims

1. A turbine-type wind turbine generator includes a generator, an impeller, and a speed-over-limit braking device installed between the two, characterized in that: A vortex air collection device is provided on the outer side of the impeller; The vortex air collection device includes a top vortex and a bottom vortex respectively disposed at the upper and lower ends of the impeller, and a flow channel baffle module is disposed between the top vortex and the bottom vortex. The flow channel baffle module includes several uniformly distributed and spaced fixed baffles and sliding baffles. The fixed baffles and sliding baffles have the same structure and both adopt a streamlined shape with the interval gradually decreasing towards the impeller, thereby forming a gradually narrowing flow channel. It also includes a flow channel opening and closing assembly for adjusting the size of the openings at the ends of the fixed partition and the sliding partition. The flow channel opening and closing assembly includes a drive motor, a drive gear mounted on the output shaft of the drive motor, and a driven gear ring rotatably connected to the center of the bottom of the bottom vortex and meshing with the drive gear. The driven gear ring is provided with sealing plates that are the same number as the fixed partition and are evenly distributed. The lower end of the sliding partition is provided with a connecting rod groove. A rotating pin is provided in the center of the connecting rod groove and the center of the bottom surface of the sealing plate. The rotating pin on the sliding partition and the rotating pin on the sealing plate are connected by a connecting rod. The flow channel opening and closing assembly also includes a wind speed sensor.

2. The vortex-type wind turbine generator according to claim 1, characterized in that: The angle between the fixed partition and the sliding partition is 120°, 90°, 60°, 45°, or 30°.

3. The vortex-type wind turbine generator according to claim 1, characterized in that: The number of blades in the impeller is equal to the number of tapered flow channels.

4. The vortex-type wind turbine generator according to claim 1, characterized in that: The top vortex has several air vents located directly above the impeller, and the bottom vortex has several slide rails that match the sliding baffle.

5. The vortex-type wind turbine generator according to claim 1, characterized in that: The overspeed braking device is a centrifugal overspeed clutch.

6. The vortex-type wind turbine generator according to claim 1, characterized in that: Photovoltaic panels are installed on the top surface of the top vortex disk, as well as on the sun-facing surfaces of the fixed and sliding partitions.

7. The vortex-type wind turbine generator according to claim 1, characterized in that: The generator is a conventional wind turbine, a permanent magnet wind turbine, or a magnetic levitation wind turbine.

8. The vortex-type wind turbine generator according to claim 1, characterized in that: The top vortex is provided with a shielding eave at the air outlet, and the outer edge of the bottom vortex is provided with a grid snow-leaking structure.

9. The vortex-type wind turbine generator according to claim 1, characterized in that: A grid is provided on the outer edge of the vortex disk air collecting device.

10. The vortex-type wind turbine generator according to claim 1, characterized in that: The vortex fan air collecting device and the impeller are connected in series in the longitudinal direction in several sets to achieve high power output.

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